K... I'll be speaking from my experience between a Blaze7, a D-Activator7, and a regular D-Sonic; not necessarily to convince but to educate their tonal differences.
Out of the 3, the D-Sonic's easily has more thump and growl for that "tight low end crunch". However, it's probably too bassy to play thrash riffs.
D-Activator7's are technically the opposite of the D-Sonic; they're brighter while the tone of the strings are amplified rather than the pickup's tone being amplified producing a crunch that's EMG-like. They definitely have a tighter crunch than a D-Sonic, but not as thumpy. Both have a "modern" voicing to it which may or may not be a deal breaker.
And of course, the Blaze7 is the pickup tone used by many players who've kept their UV's stock, not as "hot" but articulate voicing

I personally like the D-Sonic as it's a versatile hi-gain and clean
bridge pickup. Someone posted a clip of a DS7 before and it sounded sick...
Reg