WinTV pvr USB2 or WinTV 500?

[pcostanza]

I have the PVR 350 and want to be able to record 2 shows at the same time so, I'm looking at getting the USB2 or, ditching my 1 year old 350 for a 500.
Opinions please--it's not a money issue though I'd like to spend as little as possible. Dell has the 500 for $131..not too bad. But I have so many devices on my USB chain as it is now and 1 is a USB hard drive.
My main concern is possible heat. Does the 500 put out that much heat to make a major difference? Will I have possible problems with using both a USB capture with the 350 and be better off with just the 500?
Enough rambling----I look forward to your suggestions.

Paul

[reboot]

The 500 actually runs cooler than a 250 (measured system temp in my machine), and I have 2 of them, plus a 250 in one computer.
It also requires much less power than a USB device.

[pcostanza]

Thanks reboot. I spent 2 days reading every review I could find on the net and ordered one. I've been very pleased with the 350 and don't need any more wires hanging out my system plus, I think I got a good deal at buy.com ($131 w/free shipping).