Taylorce1, I get what you're after now and it makes total sense to me. Between the 700 and Howa 1500 actions, I would go with 700 simply because the tooling for blueprinting a 1500 is not common enough yet. PTG sells it but a lot of gunsmiths are reluctant to buy it and will stick to the 700 tooling they have.
Since basically all the 700's are using the same receiver, I'd find a donor rifle and start from there. Alternatively, if you have deep pockets got get a Surgeon 700 action.
The next thing I would do is to get on the phone to the folks at Lilja and talk to them about what they think they can make for you that will do what you want it to do. We can suggest based on what we have or in some cases, wish we had but we don't really know and can't know what you'll end up finding as the best for you. The folks I talk to at Lilja are the best right along with Shilen and Bartlein I like all three but tend to lean towards Lilja.
You're still going to need a gunsmith with a lathe and the correct reamer to complete the barrel and install it in your action with head space set correctly. He'll also need to thread the muzzle and crown it properly.
For your trigger, I'd probably lean towards a single stage Timney. They tend to be pretty darn good, adjustable and reliable. There are others out there and I've tried a few but I always seem to end up liking the Timney the best.
You said you already have a stock but you didn't say how it's prepped (pillar posted, overlay aluminum, etc.) If you like it, stick with it and do all the accurizing tricks you can to stop any unwanted harmonics from transferring to the barrel. If you decided it's too much work then go with a B&C stock.
All that said, you can get a Weatherby Vanguard Select in .243 for 600.00 and it's guaranteed sub moa. Take it to a gunsmith and shorten/thread and crown the barrel. I don't like the Select Stocks on these so I usually got with a B&C or the Hogue Fully Bedded over molded (a lot less work to make it great). Will it shoot as accurately with the shorter barrel, absolutely but you'll need to work up your loads to get it there. You're going to have to do that no matter which route you go. However, I would almost be willing to bet that if you have Remington 100g corelokts at Walmart or Big R they will shoot well in a Vanguard with a shortened barrel. My .308 with the 20" barrel and 1-12 twist loves their 180g.