I use a Blackstar HT-5 and get a sound very close to what I want to hear. I like 5150's/6505's but I don't have that tone and yet the HT-5 sounds good for what I do. I like Slayer and I can get a good Kerry King style tone from it. I will get a 5150 as I've wanted one since 1993 or so when I first played the 60 watt 212. But I will use the HT-5 more I feel as I can use the volume and keep my hearing.
It's easy to copy but harder to find something a little different that works for a range of tone. I like chasing tone. It feels like an adventure. :)