Put it all in the 401k (and other tax-advantaged accounts, e.g. IRA, HSA, etc.) until you've maxed them all out. Then put more in taxable. Upon FIREing, you can live off the taxable for five years as you spool up a Roth pipeline (which should be covered in dandarc's link).
In other words, you should be contributing $1500/month (which at your income, works out to about 14.4%) to your 401k, plus $458.33/month to each of your and your wife's IRAs, plus whatever else you might be eligible for.
Keep in mind that if you actually want to FIRE (as opposed to retire at normal retirement age), your savings rate will need to be high enough that, unless you're one of those special people who are eligible for ridiculous amounts of tax-deferred space (e.g. teachers who have a 401k and a 403b, self-employed people who can put $53K in a Solo 401k, etc.) you will be maxing the tax-deferred out and shoveling money in taxable on top of that. 50% of $125K is $62.5K, and if you only have one 401k and two IRAs then your tax-deferred limit is only $29K (not including employer match), so you'd have no choice but to put $33.5K in taxable anyway.
By the way, your asset allocation is (IMO) a bit too conservative. I'd keep the bond fund under 20% (but dropping it down even to 10% would be fine too) and rebalance that 7%-17% evenly between the other three funds. And I'd suggest selling off the $10K in company stock unless you've got a really good reason not to.
