i’m going to be the stick in the mud.
what is it that is so oddball about you? do you have femurs that are three inches too long for you relative to the rest of society? do you have an 18" long neck, or size 26 feet?
you paid for a fit, is that correct? probably pretty good money for it. now, at this point, you’ve got what you need to get yourself a bike, and to have it fit properly. you need to tell me (and yourself) why it is you need a custom frame.
serotta makes very nice bikes, true. but they don’t make, in my estimate, a tri bike. they don’t have aero tubes (that i know about) and they don’t have a knowledge base that’s tri specific. take a look at the guy in the ad at the top of this page. find me the serotta rider that looks like that atop his bike. meanwhile, i’ll find you twenty, fifty, a hundred, a thousand, riders that look like that atop their cervelos… and their QRs, and litespeeds, and kestrels, and kuotas, and gurus, and so forth.
so, there are two questions here. first, do you WANT a serottta? and do you WANT a custom? if so, then by all means get one! second, is the serotta the best bang for your triathlon buck? i don’t think serotta ever wins that contest, because they don’t have the tubesets triathletes and time trialers want, and they don’t have the economies of scale you get with production.
this is not to say you should always buy on the basis of bang versus buck. i generally don’t. but if you wonder why there are 198 cervelos in kona, and only a handful of serottas, it’s not because serotta is a small company and makes hardly any bikes. my guess is they’re the same size as cervelo, or larger. it’s because cervelo concentrates in triathlon, and in production, and in value.
which brings us back to your fitter, and your serotta. you got fit. you got your numbers. you can now apply them to whatever bike you want. serottas are lovely bikes. you are correct in wondering why there aren’t very many in kona. that alone shouldn’t make you stray from them. there are a lot more infinitis and mercedes on the highway than there are aston martins. me, i’d rather have an aston martin. if i had the money i’d probably opt for an aston martin. but i don’t think i’d be fooled into thinking the aston martin is the only car that’s going to work for me, or even that it represents the wisest or most prudent way to spend my money.
i think you should separate out the two parts of the equation. you got fit. you paid for your fit. that’s done now, it’s over. now there’s the second part of the equation, what bike you’re going to buy. start afresh on that.