I can't add anyhting about Oceanic regs but I can about my AL Titan XLC and Titan LX Supreme. I like them, alot, and have been very happy with them - so far. I was so happy with the Titan XLC that I sold my Mares Axis and 'standardized' all my regs to AL. The new Legend and Titan LX's are sweet.
AquaLung has a nice new 2002 catalog you can download from their web site in Adobe PDF format. E-mail me if you'd like a copy of it. On like pg 3 it speaks of how AquaLung may have improved their materials in their regs in 30 years, but yet, one only needs to stock a couple differant diaphrams to repair their 2nd stages, vs other manufacturers who have MANY models. In 30 yrs, they may have improved seat materials, but the design has remained the same, so one can still keep and rebuild a reg 30 yrs old.
This is great, especially if someone is traveling and needs a repair FAST, and from a firm with PARTS IN STOCK! A US Divers/AquaLung dealer can service their regs from the past 20 yrs with just a small inventory of parts on hand.
I think I'd select regs in this order, actually.
1. Apeks
2. Scubapro or Aqua Lung
PS My AquaLung breathes even nicer than a friends $350 Beauchat reg - and mine cost me $209!