emodiver:
i dive in abit warmer water i hate the cold thanks ill lok into one of those
You sound like you are looking for a regulator that will work well in typical recreational environemnts, at water temperatures that are not considered "cold" by the manufacturers.
Pretty much any mid line or higher regulator set from any major manufacturer will suit your needs fairly well. There are so many options in the mid lihe and higher category I can not list them here.
If you want to consider high end regulators most of the more reputable companies make them. For high end regulators I would consider the following...
From
ScubaPro, either the MK17 or MK25 series first stages paired with the X650, S600, or G250 series second stages.
From
Apeks, they describe things a little differently so work with me here. The DS4 / ATX50, the ATX50, the ATX100, the ATX200 are all high end sets. The new XTX series with the same numbers after the letters should offer similar performance.
Dive Rite also makes a very nice regulator with the RG2500 system.
From
Aqualung, The Legend LX series are high quality and performance.
From
Zeagle, their ZX series regualtors are where to zero in on your quest.
I am less familiar with Atomic, and Mares, but they and others do offer high quality and high performance regulator sets.
With regards to your choice for a backup second stage or "octopus". Many divers, myself included choose to have a second stage that is identical to their primary second stage. Normally you will not use this backup, but when you do it will almost certainly be when you or your buddy are having SERIOUS problems. This is not the time or place to save a few dollars. If you need to deploy your backup regulator you are in a high stress situation, and there have already been some problems, use a good high quality backup.
Good Luck,
Mark Vlahos