I've got a Record Power DX4000 which I bought to use as an all-in-one solution. My thinking went something like this: it's able to pull a good vacuum so it'll work for power tools and it can shift a lot of air so it'll be ok for the P/T. Also, it's got a decent sized bin so again it shouldn't be too much of a chore to use with the P/T.
Did it it work? Well, a year on I haven't felt the need to get another dust extractor so it must be doing pretty well but it's not perfect. The machine is dual motor which is a bit of a mixed blessing really. I haven't measured it but it seems pretty clear to me that when only one motor is running a lot of power is wasted sucking air through the second motor so you pretty much need to have both motors running all the time. That's a shame because most power tools only really need the suction that one of the motors could give. I also find that the motors get surprisingly warm when used with power tools due to the reduced air flow. It's great at chip extraction from the P/T though due to the fairly high flow rate (for this type of extractor).
I've used one of the smaller single motor RP extractors with a P/T as well (RSDE2 I think) - it was just about able to cope with the P/T if you took it steady.