I voted for Twin Channels, even though I own a(nother) 3 Channel amp. I've recently bought an Ampeg VL-503 combo, these amps were designed by Lee Jackson, and really are three amps in one.
Ch1 is great for clean tones, a wee bit of reverb, rarely use it though. Ch2 is where it happens for me, set so that it's just breaking up with either a Vintage Rat, a Guv'nor, or an Ibanez TK999US Tube King (my new toy!). Great tones across the range from cleanish to classic rock to super saturated gain. Great stuff. Ch3 is just dirty. It even has a built in attenuator, it's not so good for home use, but in a live situation, you can crank the Ch volume's, and still be able to hear afterwards.
Add to this equation a THD HotPlate attenuator (better than the built in one), where you can really get those power valves (2x 6550's)cooking.
So that's it, one channel with pedal's = 2 channels (well, it does in my book).
For home use and recording (at home), it's the PODxt every time. Great tones are there for you to find (with your BKP equipped guitar o'course!).