Before u go on making wrong decisions, or juz trying to copy someones else's sound, why don u be original and create ur own signature! not being crude or anything, but, tink abt it:
1) No 2 guitarist hv d same taste! (maybe some but not totally)
2) Ur playing style definately could be different frm others!
3) U need to find ur own taste and comfort zone (be it tone, pedals, amps etc)
And before u go on spilling those precious $$$, maximise every gear u hv!
Example:
1) Play wif ur Pickups (pole height & pickup height)
2) Play wif different setting on ur amp!
3) Spend some time and patience tweaking ur pedals.
4) Ur strings also do play apart in d tone! (type of gauge, coated vs non coated strings, ur open scale eg: Drop D, Standard Tuning etc)
once you've felt dat u've done all tis and still aint satisfied, den its time to go hunting!
As for amps, it is ok to buy a 100watt amp, there aint no rule saying u cant! But u also hv to take into consideration the points our other SOFT brothers mentioned abt!
For me, i do hv a 100watt amp at home! and believe me, d difference in volume can trick ur ears! for example, wat may sound at a lower volume at home, may not sound d same wen u take those same settings on ur amp & pedals to an outdoor gig or studio and crank it up! So u gotta be careful there!
If ur very particular abt tone and all, and don mind d hassle of switching amps arnd wen u gig, get an amp where u can bring arnd and as well for practice!
Juz as i would do wif my 100watt amp!!!
Juz my 2cents worth! Hope it helped somehow!