Free: Contests & Raffles.
That computer is more than good for what you do. I’d keep the SSD. The most important thing for you is your monitor. Get one that prioritizes color recreation, because a lot of them sacrifice color accuracy for refresh rates.
That dell with the ssd will make a great machine, an ssd for the os is the biggest upgrade that most people don't make to their machines due to being cheap. Personally I would use Windows 7 on it over 8 but either way you will be happy with it. If you were into building your own pc you could save some cash and build a faster machine probably but pc building isn't for everyone.
+ 1 on Newegg if you go that route
I'm kind of curious why you aren't staying with Mac/Apple? My pc is a little less than 1.5ys old (windows 8, i7 Processor) and at about the same time I bought my new pc we bought our daughter a new Mac Book Air. At the time I had ONLY used Windows based pc's. Since my daughter has had her Mac Air I've had the chance to learn their way of doing things compared to the pc's I've always used. Since spending a little time with her Mac Air, when it's time for me to get a new one, it'll be a Mac. Mine has the good i7 Processor, big hard drive and more RAM than I'll ever need but her Mac just does everything a little better and even though I've been pretty lucky and haven't had any viruses, it's no secret Macs "rule" when it comes to NOT getting viruses where as with PC's it's more of a when you'll get one versus if you'll get one. It's not often you have a Mac user that switches to PC's, typically, it's the other way around. Also, I always thought graphics was one of Mac's specialties.
The reason there are so many Ruger upgrades is because they're necessary.