Lexicon LX-7 Reliability questions

I'm looking at upgrading 6 separate amps in a pair of under-amped, tri-amped powered monitors with multiple 8 ohm drivers. The amp load is 2.7 ohms per channel X 6. Each tri-amped cabinet has one sealed 15 bass driver, and three 8" mids and six soft dome tweeters sealed together. Now, the bass is a bit heavy, highs a bit weak, and mids sound under-powered or the passive crossovers are doing something funny. I'm adding the Rane DEQ60 first to see if I can set-up a linear, precision balance with a Proceed Pro. If not, it's on to matching Rane AC23S active crossovers and bigger low ohm rated amps. To limit what the amps see using a Rane AC23S, I'll assign one new amp for the 15, one for the three 8" mids, and one for the 6 soft dome tweets per cabinet.

I called Lexicon and they still support the LX-7 although they disclosed that parts are becoming limited. I read that the LX-7 supports 2 ohm loads and it's less costly (good at this time) than two Proceed HPA3's or three Coda's. I read a couple member's notes on LX-7 fan noise and one note recommending soft dome tweeters for the LX-7. Any experiences with long term reliability or other good service center recommendations beyond Lexicon as a precaution before buying?

The speaker cabinets are front main's for a Proceed AVP2+6 processor and will likely include the Rane DEQ60 equalizer to balanced bass, mids and tweeter responses using Alan Parson's Sound Check CD and analog sound level meter. Old school, yes. Both the Proceed and Rane have "truly balanced inputs and outputs" to match the Lexicon LX-7. The Sound Check CD perfectly matches the Ranes ISO DEQ60 frequencies. That's likely more than enough project info and to the Q's:

Any comments on the LX-7 reliability/service life, other optional low ohm multi-channel amps or other thoughts is sincerely appreciated. Thank you.