I can't tell you which of the regs TO pick. It's such a personal decision. Your budget is pretty tight.
Considering that my favorites are expected to last 30 years or more, you might run the amortization numbers and think about a slightly larger amount.
I can, however, comment on the four you've listed. From the vantage point of someone who services this gear, Oceanic's Delta 5 second stage would drop it down my list. The first stage is fine.
I think the Zeagle is probably the best of your four.
Apeks has a huge following here on SB, but again, their XTX50 second stage is...uninspiring.
For sure, stay away from the XL4. Between case lugs that break easily and a faceplate that's too hard to remove, it's a dud. The first stage is great.
If it were me, on your budget, I'd choose a Scubapro Mk11 for diaphragm or a sealed Atomic Z or B for piston. Any Atomic second stage is superb, and the new SP S270 is almost as good as the flagship S620Ti for a fraction of the price.
Deep6 would be awesome, and within your budget. But you're going to have trouble outside of ScubaBoard finding support for your decision. It's a company that relies on word of mouth, instead of costly advertising and dealers that want a cut. We know how good it is. You may not.
But then, that reflects my prejudices.
Don't sweat your reg decision. They ALL can work great. Worry more about the quality of your service and tuning.
Considering that my favorites are expected to last 30 years or more, you might run the amortization numbers and think about a slightly larger amount.
I can, however, comment on the four you've listed. From the vantage point of someone who services this gear, Oceanic's Delta 5 second stage would drop it down my list. The first stage is fine.
I think the Zeagle is probably the best of your four.
Apeks has a huge following here on SB, but again, their XTX50 second stage is...uninspiring.
For sure, stay away from the XL4. Between case lugs that break easily and a faceplate that's too hard to remove, it's a dud. The first stage is great.
If it were me, on your budget, I'd choose a Scubapro Mk11 for diaphragm or a sealed Atomic Z or B for piston. Any Atomic second stage is superb, and the new SP S270 is almost as good as the flagship S620Ti for a fraction of the price.
Deep6 would be awesome, and within your budget. But you're going to have trouble outside of ScubaBoard finding support for your decision. It's a company that relies on word of mouth, instead of costly advertising and dealers that want a cut. We know how good it is. You may not.
But then, that reflects my prejudices.
Don't sweat your reg decision. They ALL can work great. Worry more about the quality of your service and tuning.