Spoke Size / Spoke Length Database - What size spokes do I need?

Shop I'd used to build the wheels didn't follow my instructions and built the front from the correct 20p/EA ACI spokes. and the rear from 85p/EA DT Rev/Competition spokes (but later resolved). After 4days of riding, the front ain't moved a millimeter, and the rear has picked up a 1mm weave.
So don't let no shop tell you how great DT spokes are. I would say the 20pence ACI's are at least an equal match to DT Swiss Rev/Competition (not sure which) at more than 4x the price.

If it was DT Revolutions, then the heavily butted nature of the spoke allows it to twist up like crazy (taking the nipple with it). So when you start riding, and the spoke un-twists (not taking the nipple so much as it is now tight against the rim). The spoke effectively threads itself further onto the nipple. throwing the truness of the wheel out. A good builder will make efforts to aviod this, or remove twist before the final true. But if any wheel is going to need a retru after the first couple rides it will be a revolution built wheel.

Can someone recommend me some good spokes?
I've used dt comp on my last wheels and can't see anything wrong with them. I need them all in one length and I'll be buying a box of 100 or 72.
So, is it worth spending a bit more on something else? (i'll be lacing phils to tb14's so i don't mind spending a bit extra, but not a fortune)
I'm struggling to find any comparison on spokes...please

And another question
Spoke calc gives me this:
Rear: Spoke length right: 294
Front: Spoke length: 294.5
Shall i go down or buy 294mm?

Please excuse my ignorance...

Depends what guage spoke you are after. DT comp, Sapim race, Wheelsmith DB 14, Pillar PSR TB 2018, and ACI DB all have the roughly the same butting profile. I've used three of these without really being able to give a solid reason to buy one over the other. Sapims did have a more quality feel about them maybe. But that probably not in a way that would effect the final wheel.

If its a posh wheel go for some lightweight aero spokes. CX-rays, DT aerolites, Wheelsmith AE 15, Pillar PSR X-TRA 1422 etc.

If not then the ACI's will work as well as any. But cheaper.

294mm.