The ARB alone is 110 lbs with the brackets and mounting hardware according to my scale, so you'll have a NET increase of about 70 to 80 lbs, not just a bumper that weighs 70 lbs. That additional 70 lbs way out front puts a lot of stress on the springs due to the cantilever effect.
I'd also caution against going cheap if you plan to wheel with a winch and bumper. No matter what springs you get, if they handle the weight, once you add a ARB and winch, they will sag, and you'll then have to add trim packs.
With the 600 lb coils on my DC, and with ARB and Winch with no rope (25 lb savings) it was borderline unacceptable. Added 6 lbs of synthetic and aluminum fairlead, and it brought it right back to unacceptable believe it or not, and by how it acted on the highway at speed and bumps on turns, unsafe in my opinion.
I don't think you'll get away with anything less than 600 lb coils with an ARB, and 650 plus with a winch. I've got the 800 pounders on my DC, and they do not seem any more harsh than the stock 480 pounders did......that should tell you what you're dealing with.
My mistake cost me $160, don't make one that will cost you more than that.
Get a coil over set up and save pennies for an ARB. Or, save a bit by getting one of their "scratch-dent" bumers for $450, versus $700 for a new one, and put the extra money into coil overs. With the money you saved on the bumper, and the money you saved on labor because now you can do it yourself wihtout screwing with spring compressors, etc., you are almost at what you'd of spent anyway, right? Especially if you figure all the labor to keep removing the coils to add trim packs after things settle and you later add a winch.
If I were pinched for money, I'd do a good coil over first, adjusted to stock height. Second, set up the rear, and re-adjust the coil overs. Later add ARB, and later add winch, adjusting the coil overs as required as you go. The beauty of coil overs is adjusted ride height for changes in spring sag or load is just a tire off and few cranks on the collar away.
Mounting a winch behind the factory bumper, you may be able to get away with stock springs and spacers, if your main concern is just recovery. If you're like me, and wanted the recovery abilities, along with a place to mount lights, and added front end protection, (and because the ARB just flat looks bitchin') you're screwed.
It's a hard pill to swallow, but there is just no cheap way to put an ARB and winch on a Tacoma and have a reasonably performing suspension.