alnico are better? whats the differnce in tone?
sorry i dont know much about pickups.
It's a matter of preference, but ceramics have a bad reputation, since the lower class instruments usually come with cheap microphonic, ceramic pu's.
But the world's most popular aftermarket pickup, the EMG 81 is ceramic too.
I have a steinberger, with EMG 85's wich have alnico magnets and they sound smoother, and less trebly as the EMG 81 in my other stein copy made exactly out of the same wood. But the 81 is way clearer if you use a lot of distortion, individual notes are still separated even with pletora of gain, hence its popularity amongst the cookie-monster music providing crowd.
I have a basswood tele with EMG T-set, wich is alnico, the ceramic set was way too trebly for me, but on my strat copy I use EMG S ceramic set, wich I prefer over the alnico SA set that can be found on the David Gilmour prewired pickguard.
Use your ear, listen as many samples as you can, determine the application, how you are going to use it ie. gain levels, musical styles, other instruments you are going to play it with, especially if there is other guitars in the band etc.
To provide a non-EMG example, Dimarzios two heavy bridge pickup beasts are the ToneZone (alnico) and the Super Distortion (ceramic) sound a world appart. Check Bumblefoot's solos for the TZ, and Ace Frehley for the SD to get a taste. Both have great sound but differ quite a bit.
But judgeing from your original post this is going to be a budget-concious project, so take that into consideration too. I for one, can get carried away easily, so to overcome spending way too much on pu's, tend to buy cheap guitars with electronics I wan to give a go.