i love the Hellatone 60Ls. i have a pair on a Bogner OS2x12 (and another Bogner with regular V30s).
the 60Ls to my ears have a slightly darker, more scooped, more high-end cutting sound to them. (i play rock, hard rock, and metal through a Mesa Mark V and Bogner XTC.) i think they sound awesome, especially for heavier tones. they match great with my Mark V.
as for getting another one, they are hard to find. Avatar doesn't have them any more. they were a special variety of V30 made for the Marshall Mode Four cabs called Vintage 30 MF (if you compare the "T" Celestion model number stickers on the side of the magnet, those and the 60L are exactly the same model #.) you can find them on Ebay if you dig. i scored a bunch of spares.
as for pairing it with a V30, i would worry, because the speakers are pretty similar, about getting harsh phasing or comb-filtering in the overall sound. if the comb filtering cuts important frequencies or boosts harsh frequencies, it will sound harsh or weird.
(i had that once with a V30 and H30, probably because of the distance apart they were in that custom-designed cab.) so if you do pair it with a V30, you might want to score it used so you can flip it if you do get bad phasing.
