Which acoustic / semi bass?

I personally think the Takamine EGB2S at about $500 would be a better bass than either the Epiphone or the Ibanez. You might want to try one out. Godin also makes some great acoustic electric bass guitars (A4 & A5 models). They're closer to $1000 new but you might find a used one. On the slightly less expensive side you could also try out a Michael Kelly or Washburn. They're both pretty good and cost around $450. Just don't go real cheap and buy a Dean or you'll regret it.