Whatever decision you take (return or retain) is fair, IMO. You said you are a student, right? Obviously, your purse will be tighter than other groups. But you are also in the second least-affected group (unharmed amp/HPs, and having the option to return your amp), next only to folks who have not bought the amp but still hurt for others. It is just that showing our anger might not resolve the issue faster.
Its a practical fact that electronics fail, and in many brands. Please note that some of us got angry and some of us felt reassured too (and some users are not that bothered, probably because they have been through these cycles earlier). IMO, very few L30 owners will be cool or indifferent to what's happening, but hopeful that no more blow-ups happen, and that we will have a solution soon, if things aggravate.