Really depends on your career path. If your in a job where your equipment is HP product, then I would look at least into the AIS. If you are going to work for a reseller, the ASE is a definite plus for a reseller that does a good HP business. I would not stay away from the Cisco by any means since that's the "popular", most published route, and everyone looks at Cisco as the "standard" (funny since they do have a lot of non-standards based protocols, go figure) but you make yourself well-rounded and even highlight yourself by having the HP certification(s) as someone going outside the "norm" since you will run into a lot of peers with some sort of Cisco cert but next to non with HP certification.
My opinion is that HP actually makes better switches as a whole, couple that with there standard lifetime NBD warranty (not some "product lifetime" like Cisco will state of between 7-9 years, but as long as you own the product warranty) and your total cost of ownership for that product is amazingly cost effective. I know HP has come on strong here the past year or two and think that in another 2-3 years, they will seriously give Cisco a run for their money.