People, when one of our members writes, "I have some injuries that prevent me from hauling the heavy stuff," the replies about how you'll never be 100% happy w/o a JBL, true or not, are not fully responsive. The OP has an injury
. He's not asking for a miracle cure, only for practical
suggestions he can live with.
Twizzlybear, the other guitarist in my band, at practices (not gigs), runs his Strat into pedals into a stock Blues Junior. It's not perfect but it works. When we play out and he needs more volume, he uses his Hot Rod Deluxe. Also not perfect but quite passable (I can assure you no one in the audience is walking out over his horrible Fender combo tone!).
For a reasonably light neo option for either amp, this is probably your best bet: https://taweber.powweb.com/weber/neo12.htm
Injuries and back issues definitely do suck. My own back goes in and out on me. I have a 2X12 cab with one of the above Weber NeoMags in it paired with a Jensen Neo 12-100. It is reasonably easily transported.
I also recently copped one of Tracy Lowes' Sound Scaper Productions 1X12 cabs. http://www.soundscaperproductions.com/page0/page0.html
I put my JBL E120 into it just this Friday. I was surprised, due to the SSP 1X12's small footprint, how readily portable it is. So if you're willing to forget the combo and go head/cab, this could work nicely for you.
For your head, this combination would, in total, weigh under 18 lbs. and mate up well with any of the above speaker recommendations:http://www.sarnomusicsolutions.com/products/ctp.html
(4.5 lbs./$695) + http://www.carvinguitars.com/products/DCM200L
(4 lbs./$279) + http://www.sweetwater.com/store/detail/GR2S
That's a total of around $1100 (less if you buy used) which ain't bad considering what you're getting.