I have used a mix of Minolta, Sony, Tamron and a few Sigma lenses for the A mount. My walkaround lens is my 28-105. It's a 15-20 year old Minolta lens. It's fairly sharp but it suffers some CA that I have to correct in PP. I find that the lenses made for film can feel a little cramped when shooting inside. 28mm is not wide enough.
My list for the perfect lens kit for me would be;
Tamron 17-50 f/2.8
Tamron 70-300MM F4.5.6 DI USD
Sony 50mm f/1.4 or Minolta/Sony 50mm f/2.8 Macro
Collection of older Minolta primes and macro lenses to play with.
I happen to like Tamron. They are part owned by Sony and make some of the Sony line including some of Sony's higher end lenses. Because of this Sony users don't have to worry about compatibility issues that others may have with Tamron and Sony users have with Sigma (my 70-210 won't work on SLT camera's). They might not be as heavy as some other company's lenses but to me they are a good compromise between cost and features and most seem to have excellent optical qualities.
Sony A100, Sony 18-70, Minolta 28-105xi, Sigma 70-210 APO. Kata 3N1-20
Canon Powershot SX20is
Lots more to buy, no money to spend.