Keg man, look no further than the EVH 5153 50w, like that other guy said. That thing is something really special.
I've tried the ENGL 840/50 which was ok, tried the Carvin TS100 (I think it is) and none of them could even come close to what the EVH delivers. So much so, after going down the 4CM path with the EVH head, it made my decision of selling my beloved Bogner XTC head with a clear and non-regretful conscience. The HBE amp sim sounds f_cking incredible! As does the Euro Red (which was the reason why sold my XTC head), and even the actual 5153 amp sims are more tweakable and versatile than the real thing!! Go figure, right!?
*** I repeat what I wrote above.. using the EVH 5153 50w head in 4CM made my decision of selling my beloved Bogner XTC head with a clear and non-regretful conscience.. But, you won't know until you try it.
If you end up getting an EVH 50w head, let me know and I will happily send you some patches to try out (as long as it's Axe-ii). I've set up some scenes where I can toggle between (or X/Y) amp sims vs the blue and red channels of the EVH... and every time I do that at band prac, my band mates all unanimously agree that the amp sims do sound better than the real thing..
Food for thought mate..