Firstly, the basic Epson printer is pretty awesome. I love this printer. I almost didn't get it because I didn't want to be bothered carrying it out of the mall, but I'm glad I went for it. So I'm sure the pricier printers are even sweeter.
Looks like you have a lot of indecision about what you want. As far as the memory goes, just upgrade it yourself. It seriously is a tiny little job. Very easy. You can get 8GB for as little as $82 from Newegg.com.
Is the glossy screen really bothering you? Because it's not a case of one being clearly better than the other, it's more of a preference thing. The glossy screen gives you richer color, but is prone to glare when light reflects off of it. I've been using glossy for the past year, first on my 13", and now on my new 2011 15", and I have no issues with it. I like the black bezel better. I like the richer color better. I find the glass is easier to clean on the glossy too.
Just things to keep in mind. Just decide what you want, and lose any guilt you may have about returning it, or thinking it's a hassle. Because it's not a hassle if you're in your return window, and it's seriously 30 minutes or less of your life that'll be over before you know it.
I agonized over whether or not to return an iMac in order to get the new MBP. And I tried to convince myself I wanted to keep the iMac, but I knew I wanted the MBP, so I finally broke down and returned the iMac on the last possible day. Very glad I did so.