I've got a Rifa LC-66 and like everyone else I love the quick set up. One drawback, however, is that some accessories are very expensive - a 40 degree eggcrate is about $250. at B&H.
One other thing to consider is whether or not to put your money towards a nice soft flourescent light instead, like from CoolLights (www.coollights.biz), which is a DVXUser sponsor. For the same money you could get one of their 4x55w portable units.
On the other hand, I've just looked into converting my Rifa-66 into an EX model, using their retro kit (yours would be the LC-78 conversion kit) for $138. at B&H. The EX lets you plug in different lampheads, like a single or triple standard edison plug for spiral flourescent bulbs. Unfortunately, those little spiral bulbs don't generate a lot of lumens, so I'm thinking about getting a medium to mogul converter that will let me plug in one of Coollights' massive 200 watt 8U, high CRI flos - I'm not positive this will work (e.g. it might be too front-heavy), but it would give you the equivalent of about 600W tungsten.