I have a 2270 as well and after a few upgrades settled on these Jamo c103 speakers, which were for a while easy to find for cheap as I got the more expensive walnut veneer version hardly used for just $350 and they retailed for something like $1800. My taste runs a bit to everything, but honestly they might not excel quite as much for rock as with stuff like jazz and other acoustic music, though I play all kinds of stuff though them and enjoy the sound. They have a really rounded, full sound, with excellent imaging, but aren't as lively as some. I do run my system with an SVS subwoofer, but even without, those speakers have a satisfying level of bass. I've heard that the phono stage is pretty good on those old Marantz receivers, though I feel like the sound did improve a bit with the phono preamps that I've had, first a Cambridge P651 and now a Schiit Magni mkIII (which is a very inexpensive upgrade).
As for the turntable, I was really satisfied with a Technics SL1300 table that I had for years, used with a cheaper (forgot the model Audio Technica cartridge that I upgraded with a better nude elliptical style stylus, which made a big difference in sound quality), that is until I got this old Yamaha PF800 table with a Denon DL110 cart. The Yamaha with that Denon cartridge, amped up with the Magni mkIII (a better match the the older Cambridge Audio premap that I had been using) really sounds incredible to me and though I was lucky enough to be given this stuff by a friend, it seems that these turntables are not that expensive. The one disadvantage that I can see with these things is that they are somewhat rare and apparently hard to find parts for (the tonearm is a unique kind of one-off design, I believe), but they're known to be very well made so that if you are able to find one in good condition it's likely to be really solid. Finally, like your Technics table, it's an auto return style, which is something that is important to me and likely some other folks (I don't want to have to deal with pulling the tonearm off of the record each play). I believe that you can find one of these tables for less than $1k and though I'm no expert, it might be a better value than anything you can get new for that price...