I appreciate Sig pistols, I just wouldn't care to own another. High quality and well built, but just can't get past the ergonomics and the DS/SA action. Haven't owned a 229, but have owned a 226 and a 220. I found new homes for those. IDPA and Bullseye are two different animals and are better served with two different pistols. The Glock 34 would be my first choice based on my experience with the platform, and observation of hundreds more at matches and qualifications. Of course parts availability, factory and aftermarket, price and reliability are factors as well. The 34 would serve well in IDPA and informal Bullseye matches, not to mention an excellent home defense pistol. The XDs would work well in those roles as well, but there's not the plethora of parts available, and cost a bit more. Have fun choosing!
Savage