I agree with a majority of the posts on here. Its a coke/pepsi canon/nikon debate.
Which camera is better? Which drink is better? They are good/bad in their own ways.
I upgraded for a HOB filter to a cheap [censored][censored][censored][censored]ty canister filter(HOB died) and found that canisters are way better(on 29g). I scoured Craigslist and also joined the Greater Seattle Aquarium Society(GSAS) and asked if anyone had any filters for sale([censored][censored][censored][censored]ty canister sprung a leak on the seal).
I found a guy on GSAS who sold me his Fluval 305 to me(he also ran it on a 29g) but upgraded to a FX6. I got it for $55 so i couldn't pass it up.
I would recommend you browsing around, find a dedicated fish group in your area and see if anyone has a spare they can give away to you for cheap. I can't say much about Eheims, but my 305 is perfect for my 29g tank.
NO seal problems, NO leaks, NO issues, NO worries. I've been running the filter for more than 2 years now. I do think i should do a tune up on it(kit comes with impeller, shaft, cover and seals), however I'm a cheap bastard and it works for now. Until i actually NEED to, i wont.