I think you are smart to buy that Sportco, matty86suk. They sort of look and feel like an overgrown Cooey (posh, they are not!), but they are a good solid platform to get into shooting affordably.
I'd like to put forward a case for (at least considering) keeping the factory trigger...
When I got started building rifles I was under the assumption that I simply *had* to replace any factory trigger, that they were of necessity crap. Since then I've shot a good number of top-tier custom triggers, as well as a number of factory triggers, and my thoughts on this have really mellowed.
On my M70 (the first target rifle I built) I ended up going back to the factory trigger, after having tried a Timney (in hindisght, no better than the factory trigger) and a Jewell. I find the factory M70 trigger to be completely shootable (I have it set near the lower end of its safe adjustment range. While I haven't weighed it, I would SWAG it at 3-ish pounds.
I haven't owned a Rem 700, but I have helped set up a number of different 700s for friends, and I have quite a bit of respect for factory Rem 700 triggers. They are nicely adjustable, and really feel quite good to shoot. Unless I needed a very light trigger, I would without hesitation use the factory 700 trigger (now I have a great deal of disrespect for the Remington safety system - but that's another topic ;-)
I have a couple of Savages (older ones, non-accutrigger, with adjustable sear engagement). With the sear engagement set to minimum (and the safety disabled, since it will no longer safely work when the sear engagement is minimized), I find the trigger to be *really* good and clean.
It is true that it is easier to learn to shoot an 8 oz. trigger well than it is to shoot a 3# trigger well. But with a year or two of shooting, it is possible to learn how to break a 3# trigger cleanly and without disrupting your aim (to TR and even F-Class levels of performance).
It is also true that in serious, all-out F-Class competition, a lighter trigger is probably a worthwhile advantage, because it allows you to get a perfectly broken shot away several seconds quicker than it takes to break a perfect shot with a 2-3# trigger.
Don't get me wrong, $200-$500 triggers are gorgeous things. But if you are looking for expenses to defer or avoid, this is a darn good candidate. Absolutely critical for a good accurate rifle is a good barrel, and a stock that is properly bedded to the action - you must get those two items right.
It is a worthwhile shooting skill to be able to cleanly break a heavy(ish) trigger, one that can let you do all sorts of cool things - for example, shoot an AR-15 with a factory trigger (heavy and fairly creepy) to impressive levels of accuracy (i.e. fully what the rifle itself is capable of).
Which I guess is a very long way of saying, don't necessarily be scared away from a factory trigger.