on the first: it depends on how "wide angle" you're going to want. I have a 10-20mm and a 17-50mm lens and find I use the 17-50 9 times out of 10. The wider one will take indoor pics with fairly minimal distortion above about 15mm. The trouble you'll have is that
fast wide angle lenses are pretty spendy specialized lenses and a good (reasonably priced)3.5-4.5 10-20mm is not that useful under indoor lighting.
IIRC you have an APS-C camera as well so you'll have to take into consideration the "crop factor" ie: you'll "lose" some of the advertised wide end.
I'm totally sold on the Tamron 17-50 f2.8 ($400ish). I think it will do a very good job at both applications.
For the macro. I dunno. Hopefully Ray will chime in on the tubes as IIRC he uses them to good effect and I suspect you'll do well with them.