Well I've been using the i.prestige mp (XL) constantly since I got it (used about 2 weeks ago). I've got the IGPMP as well, but I'm leaning toward the i.pmp.
The IG is good and only gets better with weight, in fact is a real pleasure to hit, the more weight you add (I didn't add any to the handle). It is so different than a lot of racquets - PA, XTPMP, GPMP, Speeds, PD, Blades, in the sense that it becomes more stable, plush, powerful with more weight. Consequently, the others become more powerful, but erratic cannons. The IG becomes better than an RF97 with the right amount of weight (I ended up with a total of four 4" lead strips, 2 on each side from about 1-3 (and 11-9).
The i.prestige doesn't even feel like a prestige. It feels more like a stiff radical, and the extra long version has a nice flex to it. I never liked XLs (other than the Gamma 137) but this one is light and flickable enough to move around easily. It has good power stock, certainly more than the IGPMP. The paint is horrible (nothing a black sharpee can't fix lol) and it doesn't necessarily feel good when you hit it, but it is easy everywhere on the court and I can generate all kinds of pace with it - very controlled power. Serves are a little harder, but I think it will be fine to adjust. Volleys are a lot better than the IG. Returns and ohbhs are easier to control and get back with the i.prestige.
Overall the i.prestige takes this one for me. Its easier and fun to play with. Its so weird playing with a racquet that's this old.