To all who participated in this thread- many thanks!
I have been looking for a comparison like this for a while.
I was looking at the Flex tools on Porter-cable.com,
They mention that FLEX makes the polishing tool used on production lines in European auto makers.
I have some steps to be repointed and I noticed that FLEX makes a grinder/polisher I thought perhaps I could use one tool to do both jobs.
I was thinking about the Porter Cable L3406VRG 12 amp 2,100-6,400 rpm with noise reduction.....until I read the post about needing speeds under 1000rpm.
So I sorta threw the dual purpose Polisher/ grinder out the window. Some guy at Pro tool of Waltham said buy the Dewalt and pick up a Bosch grinder.
Other Porter-cable/Flex tools
L1501vr 275-920 rpm 9" polisher- they say its good in the PDF on Porter-cable.com
The Porter-cable Lk603vb 10 amp 1000-3000 rpm Used in German auto production lines
I haven't picked up a Dewalt for a couple of years. I compared drills a while back and felt the Dewalt was clunky (I have average size hands) and underpowered for its size. I ended up buying a Panasonic drill- which was great for its purpose (Sheetrock + household + buffing out wax from snowboard bases) but service was a nightmare.
The tools that never failed me no matter how many times I loaned them out to people who were likely to break tools were my Porter cable corded drill and Circular saw and Porter cable router.
My Bosch drill- big and expensive cordless ....burnt out within weeks of snowbard polishing use. My Bosch plunge router also did not stand up.
My Dewalt drills circa 1990 all died years ago and were not worth fixing as they had been replaced by better models.
So why do I post this? I don't see anyone pushing the Porter cable rotaries or the Flex ones. Which...I think might be a red flag since it seems "everyone" has the PC 7424 and loves it. I plan on buying one as well unless I can find a great tool that is both a excellent rotary and excellent DA (I heard there is one but have not heard the review).
The things I am looking for in a product are:
1. Durability - I hope to never need to service it for at least 10 years.
2. Ease of control- I want to control the rotary not have it control me. Great Ergonomics are helpful. Weight is not a huge issue if the product is easier to handle than others. I believe a well designed larger rotary might even be easier to control than a poorly designed smaller rotary.
3. Speeds- preferably limiters on top rpm.
4. QUIET- I don't want a huge headache after using the product. (Panasonic and Bosch were the quietest drills for instance taht I found years ago)
I know the process means much more than the tool- but I don't like fighting the tool. Having a great tool makes you more efficient. Owning a Wustoff Grand Prix 9' chef's knife made me far more efficient in the kitchen- and resulted in zero injuries as compared to lesser products.
I can only assume having a great rotary will only help to reduce accidents.
So far as price...I really could care less. I do believe that in tools you much more often than not get what you pay for...
And on a positive note.....I won't be paying any money for this one- it is being bought for me in exchange for other work I am doing.
A short list of favorite products I have been fortunate enough to own.
Bryston 4b Amplifiers (20 year retroactive warranty)
Wadia 860 CD player (makes CD's sound real)
Infinity RS1b reference standard speakers (The only Infinities that did not sound colored)
Entec Sw-1 subwoofers
1 Black 1994 E500 Mercedes (totaled- t-boned, by 21 yr old in his moms M3

it had only 23,500 miles....sniff)
1 Silver 1994 E500 Mercedes with E500 limited EVOII rims 60K
Almar Eagle pocket Knife
Zero Halliburton z-roller carry on
MC4000M McIntosh 1000 watt Amp + MC440M 400 watt amp
Nakamichi TP1200 Special Shop (not distrib. in USA) remote car preamp.
Madd 158 alpine carving snowbard
PVD skateboard trucks
and to add to this list....
I would like to add Autopia (though I can't own it) the posts you have put into this forum from everyone....even the heavy handed guys....are invaluable to me and have started me on a new hobby of tweaking.
Many thanks...
and if youa re still reading.....
which Rotary should I buy?