Ballance is different from person to person. My Mach 34 holds very well with no additional weight and shoots extremely well. It holds much better than my previous Hoyt carbons did.
I've been a Hoyt fan since my first Hoyt back in 2009, I've owned and shot 3 different carbons and 3 different aluminum Hoyts since then along with some other bows. I was never a fan of the old PSEs, ie the original Omen era and the first carbon they came out with was horrible. After hearing all the hype over the new PSE carbons and growing tired of my short ATA carbon Hoyt I started a search for a new carbon bow. In the end, I built a custom Mach 34 with short draw cams. The PSE won for me over Hoyt in every category that was important to me. It draws smoothly, shoots fast, is lightweight, and has a much easier tuning system than the Hoyt.
To me getting a Hoyt Ultra didn't work with my 27.5" draw, my speeds with an Ultra would be slower than my speeds were when I bought my first Hoyt. I feel like Hoyt has gone downhill big time over the last 5 years. Their bows have been getting heavier, shorter, and slower. Everyone else's Carbons are similar, short, slow and heavy.
With my Mach 34, I'm getting a calculated IBO of 341fps with a good draw cycle and 6 11/16" Brace. Very few bows on the market meet those specs aluminum or carbon.