As Mark said, welcome!
I agree - these days, you can get a nice receiver for $300 or less that will come with most of the bells and whistles of the higher priced models. I'm a huge fan of auto calibration systems (I use MCAAC), and those are available on several models in that range. Watch for sales (I use dealnews.com, as well as checking the deals posted by folks here), as you can get some good buys.
Speaker-wise, it pays to go listen. I know it's more time, but it can pay off. You probably won't be able to go out and hear very many speakers, but you can certainly go listen to enough to know if there are some that you prefer out of what you heard - which might not agree with what other people like. For example, when I was shopping back in 1997-1998, I had heard great things about Polk, Paradigm, Definitive Technology, Bose, and (to a lesser degree) NHT...as well as some other brands. When I went to audition them, though, the Paradigms were like nails on a chalkboard to me, the Def Techs sounded like the singer was in another room, and Bose was unimpressive. Before hearing the NHTs (that I ultimately bought), I really liked Polk. In fact, I almost bought the Polks. After hearing the NHTs, the Polks sounded muddy to me and I'm glad that I didn't buy them. Btw, this was 14+ years ago - speaker models change, companies change, and what I like isn't necessarily what you like.
My point is just this - auditioning led me to buy different speakers than I would have if I'd just heard one or two kinds, and it led me to buy different speakers than I would have if I'd just read other people's opinions. You can also audition at no risk from places like Aperion Audio (who will pay shipping both ways with no restocking fee if you decide not to keep them).
You can also check out used speakers. Being a fan of the late-90s era NHT speakers (like the 1.5s, 2.5s, and 2.9s), I see them on eBay from time to time. There's a pair of 2.5 towers and a center channel for $400 right now, but it's local pick up only. That's a really good price, IMO.