Hope some of your horses come in for you. I've never placed a bet in my life so wouldn't even know where to begin *smile*
If you get some spare cash then I'd look at replacing the turntable first, wouldn't even look at the amp as it's currently servicing multiple needs so keep the box count as it is. Beware of upgraditis, it is a severe condition that takes an incredible amount of willpower to stop, I'd put it on the same level as smoking, it's an addictive lust-based affliction.
Good luck and if you do upgrade then buy something that sounds good to your ears, that's all that really matters. Most of my gear has been bought blind but it all sounds good to me so I've been lucky. The motto of the forum is disregard reviews and audition, audition, audition.