205 Gti's are great cars, mine was a standard one, but it gave you such a massive sensation of speed, it always felt like you were doing 900mph when you probably weren't! lol I only brought mine because it was cheap and tidy, such great fun though
MI16 ones are very fast, but wasn't really my bag as you had a lot of cam lag? with that engine, my brother's won't really take off until about 4k then will scream along to 7k or whatever they do. I prefered the mid rangey 1.9 8 valve engine, mine would pull along in any gear, even 5th gear at 30mph

ultimately the 1.9 8value is a slower engine, but is a lot easier just to blagg round in I think. Personal perference at the end of the day, my brother prefers the MI16
Should be a great track car that will surprise a few! Really nice purchase you jammy so and so!