I have a small space dilemma in my component rack/TV stand. My receiver, DVD player, CD megachanger, and soon a SACD player will take up the four spaces I have on the rack. This is a wide rack from Studiotech (ZR series). I am left with two options for placing a 2-channel amp, or monoblocks. My TV sits on top with about 7.5" on either side of free space, and then my speakers are each about 4" away from there. So I could place monoblocks in this small space. --Q1: Can anyone give me the dimensions of the Marantz MA-6100 and MA-700 monoblocks? --Q2: Will I have any problems with placing them right next to my TV (a Sony Wega 27")? --Q3: Will their proximity to the speakers be any problem? My other option is to place a Parasound HCA-1000A atop my DVD player (a Panasonic DVD-RV30). I have 4 3/8" of space on top of it, and the Parasound is 4 1/8" tall. Will this be OK? If heat is a concern, there is an additional 1 3/4" above the amp for a total of 2" of space. The underside of the shelf above is a metal frame that extends around the perimeter of the shelf, which is why there is little space to actually put the amp atop the DVD player but more space for heat to escape. --Q4: So providing that heat should not be a problem, my only concern is having this amp on top of my DVD player (it weighs 22 lbs, and I'm not sure if there are other problems I need to consider). Finally, I would like opinions on which would provide greater sonic benefits for my current system, which is used mostly for music. I have a Marantz SR-7000, which would become a pre-amp and be used to drive my rear speakers. Up front I have Paradigm Studio 40s. --Q5: Disregarding the space contraints, and given that the cost for each of these amps is very close, which is the best choice: Marantz MA-6100s, Marantz MA-700s, or the Parasound HCA-1000A? Thanks in advance for any help here.