Another vote for the CPS chips. You're at a crossroads starting out. You have an opportunity to get amazing chips at GB pricing. The $.29/chip is a steal, considering these chips are worth more than that already. The care and time that went into designing these and matching colors was incredible.
You mentioned cash games: What are your stakes? With a $20 buyin, I'm guessing $.25/.50 blinds, or maybe $.10/.20? $.25/.50 seems to be the most standard for low stakes sets.
I'd suggest this:
200 $.25 chips
200 $1 chips
200 $5 chips
For your game (assuming $.25/.50), this allows plenty of chips for play, rebuys and expansion. Plus, it's all nice even amounts (OCD approved) and will fit nicely into a 600 chip birdcage or 600 chip aluminum case.
If you're looking to get into a tournament set or play different stakes, then my advice might be different.
For reference, I regularly play $.25/.50 games with 9-10 people. We have buyins that start around $40 and jump to $60 once the table avg hits $60. I don't cap rebuys (if someone busts and wants to put money on the table, who am I to stop them). We routinely have $1000-1500 on the table. When I started playing more seriously a couple years ago, I was playing the same blinds (with $20-40 buyins), but might only have had $200 on the table (tops). As you play more, your game might evolve.
Best to plan on it anyway.
The set above would cover a game with a bank of $1250. Sounds like plenty for you (at the moment).