I am currently the SLM Service Center Administrator, been with SLM for 23 years, most of that time was in the service dept were I did all speaker cab repairs, quality control & testing & technical support to end users & Svc Ctrs.
Remember the 8x10 has terrible low frequency responce. It will only go down to 55hz. A low E is 40hz, a low "B" is 32hz.
In most "infinite baffle" [no ports] you will find the low end freq responce is not very good.
The 8x10 gets it's muscle from "strenth in numbers" 8x10 inch speakers can be loud. The speakers themselves are inefficiant.
The SVT410HLF is a great cab. When someone tells you it's "boomy" this & that, take it with a grain of salt. If the guy playing it is a hack & has crap technique, digs in on his instrument, loves tons of bottom & spanks the thing like he's a rock star, then it will probably sound crapy. If you play well, & don't distort your preamp, you can get away with a cab rated at half the power rating of the head.
The most important thing is "match" your impedance & get something that sounds great to you. Some guys like a flabby bottom, some guys like a tight steril sound with deep lows. Some guys uses "neck throughs", some play "bolt on" neck basses.
It is too subjective to be etched in stone.
Let your ear be your guide.
On a tube amp ALWAYS match your impedance. If you have to mis-match for a gig or whatever, the cab should be a higher impedance than the amps minimum ohm rating.