The 1056 or R12 will be much better built.  But you've also chosen 3 different bikes with different geo and tube profiles so you might want to think about that.

I highly doubt the 177 layup uses any T1000.  And to call it T1000 as they do is misleading anyway, as even if it did, it'd probably be less than 10%.  Chinese outfits (typically the low quality ones) use the T1000/1100 term interchangeably with high modulus / light weight.  The 177 is relatively light weight.   I'd be skeptical that VB or similar price point frames are using genuine Toray stuff anymore anyway (that's not to say Chinese equivalents are bad), given price rises.

Thanks. Yes, admittedly, I'm not at all well versed on geometry and I did notice that the tubes seemed more geared towards weight savings in some and aero in others. 

I currently ride a 2011 S-works SL3 with R7000 105 components. Rim brake, obviously. It's on its way out and I'm not that happy about what you get for your money from the LBS these days, so want to build up my own bike. Not just for the cost savings, but also for the learning experience.  I thought I'd go with some frames that were similar to the SL7 but obviously I've missed the mark. I'm obviously many years older now, and I'm wondering if my reach has shortened a bit.  I'm also heavy enough that the weight savings from a very lightweight frame will be wasted on me. I'd rather go with a frame that is a bit heavier but well made and remains stiffer for longer.  I don't race apart from a couple of 160km sportive's per year, so happy to go with a more endurance type bike.

I know this is a very open-ended and question, but if you do have any suggestions about a frame that might be a good match, let me know. Thanks.

Can guarantee that Velobuild is not using any T1000 carbon. Their frames are amongst the heaviest ones coming out of china!

Thanks. Yes, admittedly, I'm not at all well versed on geometry and I did notice that the tubes seemed more geared towards weight savings in some and aero in others. 

I currently ride a 2011 S-works SL3 with R7000 105 components. Rim brake, obviously. It's on its way out and I'm not that happy about what you get for your money from the LBS these days, so want to build up my own bike. Not just for the cost savings, but also for the learning experience.  I thought I'd go with some frames that were similar to the SL7 but obviously I've missed the mark. I'm obviously many years older now, and I'm wondering if my reach has shortened a bit.  I'm also heavy enough that the weight savings from a very lightweight frame will be wasted on me. I'd rather go with a frame that is a bit heavier but well made and remains stiffer for longer.  I don't race apart from a couple of 160km sportive's per year, so happy to go with a more endurance type bike.

I know this is a very open-ended and question, but if you do have any suggestions about a frame that might be a good match, let me know. Thanks.

My preferred action is going to be to build up a new disc brake bike for the reasons stated above