I'm going to vote for the Jaguar 200 as the winner of the 4-KT88amps with the smallest footprint contest. --- Jaguar 200. 4 KT88 - 200 Watts - Head dimensions: 20"W x 10"H x 11 1/2"D; Weight: 50lbs. Nice small box, and not that heavy. Standard transformer by Magnetic Components. The amp has a fan to help cooling. Smaller than the Reeves, but every bit as high quality.
I had the Prodigy for a minuet, and sold it off. I found it to actually be a little too small - as in it felt cramped like everything was too close together. Also found too much break up, too early, on the low notes. The high strings would stay clean, but get down to a low G-E and it would just break up like crazy with the gain at 1:00 or past. The Jaguar has a very nice layout, while still being small. It will break up with the gain cranked, but more clean headroom than the Prodigy, a nicer sounding break up, and it breaks up more evenly across the strings - not just the low notes.