Go for Fischer/Lotto. THey give out sponsorships like crazy to ne1 that is pretti much ranked in Aus. But personally id try and get Diadora or sumthin, coz if u get Lotto u hav to use Fischer racquets, and it not worth changing racquets just for sum ...
The number on the Wilson racquets refers to a stiffness index rating. Racquets in the range of 1-3 are stiff and powerful racquets designed for people with compact strokes. 4-5 are designed for a balance between power and control for players with med...
do not buy racquets off ebay. they are often fakes, looking identical, but playing like rubbish. amazon is safer if you have to buy online. Alternatively you could go to your local tennis club. they usually sell tennis racquets as well.