Im debating to go 1 or 2 ohms rather than 4. I defenitly want 2 type rs and i need 1,000Watts of RMS power. If i wire the subs to 2 ohms i can get a cheap Hifonics amp and power them, or i could get a more expensive 4 ohm 1000 watt amp but i dont know how much better it would sound.

Generally, amps that are stable at a lower ohm rating are more expensive. Finding a clean, 1-ohm stable amp will probably be expensive. 2-ohms is much more popular. The advantage is that if an amp is 2-ohm stable, it can produce nearly twice the power it would at 4-ohms. As far as sound quality, afaik the ohm rating is not directly related to sound quality. I.e. a 4 ohm W7 should sound just as good as a 2 ohm W7 assuming all else is equal.

speaking of ohms, if an amp does the same rated power at either 1, 2 or 4 ohm, will it have less strain on the electricals if its ran at a higher ohm? take an JL 1000/1 for example: 1000wrms @ 1.5-4ohm.

JL is an oddball. It uses a R.I.P.S. supply, which is a regulated supply and therefore supplies constant power throughout its stable range (1.5-4ohms). Amps of this type will provide the same "strain" or load on your cars electrical system no matter what impedance (ohms) driver you attach (1.5-4 for JL slash series). 400watts at 4ohms "looks" the same to your battery/alternator as 400watts@1.5ohms. In fact, it's seeing more than 400watts due to the fact nothing is 100% efficient (class D is more efficient than class A/B or especially A though), and input power > output power.