I spent the most that I felt needed to sound 'fine' to me. What's with the pairing of subjective terms? What I spent could be seen as a lot (to someone who's never bought audio equipment) or a super-budget (to an audiophile).
I've also got an audio interface separate from the built-in one for my laptop, but I only use it for recording.
You could certainly go cheaper (laptop -> active speakers or cheapo turntable with speaker built into them) or way way more expensive (audiophile-quality).
Your choices ARE "audiophile quality" because you chose wisely (although I would have spent a bit more on the TT, say a Pro-Ject Debut Carbon). Price does not (and never has) = value. The point to take away, though, is your baseline is good enough that you could now evaluate a more expensive component and know whether it's an improvement or not, again regardless of the asking price. Another option would be TEAC who have a nice stereo receiver with phono for $180 with 100w/ch versus the Onkyo's 50w @ $120.
365 Days of drinking Lo-Cal beer. = 1 Lite-year