Apple Logic Pro /LogicExpress Discussion

I recently purchased the Alesis IO/14, but it went all wonky on me  
and had to be sent back to the retailer.   This leads to three  
questions:

1.  Should I try a replacement Alesis?  My problems were most surely  
due to a defect in my unit (audio disappearing after 1 minute of  
playback, and failing to power up for 3 days before suddenly working  
again).  If I had a lot of faith in the company I would just have  
them send me a replacement, but I have heard of big QA problems with  
Alesis products, and don't want to deal with a never-ending stream of  
hassles, especially any that pop up AFTER the 30-day return period.   
What are people's experience with Alesis?

2.  Are there any problems with aggregating devices?  Another option  
is to replace the Alesis with a different similarly-priced product,  
but I would lose ADAT ins.  However, I could aggregate my new product  
(410, Saffire, Konnekt8, Firebox) with my two older products (Duo,  
EZBus) for the 6 pre-amps I need.  But does the aggregate device work  
to the lowest common denominator, or place extra burden on my CPU or  
USB/Firewire busses?

3. Or, I could abandon my 3 low-end units and throw another $250 into  
the pot and get a MOTU 8pre.  I have no doubt everyone would  
recommend this option (or adding $700 and getting a Fireface!) so  
this isn't really a question.  I just have to weigh $250 vs.  
convenience and quality.  I wish the 8pre's inputs were in the front,  
like the Firepod though.

Thanks for any and all input.

Gregory