SIM Only plan currently on Meteor

I recently received a SMS from Meteor informing me that they would be upgrading me from my current SIM only plan (€12.50 p/m, 100 minutes, 100 texts, 750MB) to a, 4G, plan (€20/30, 100 minutes, 100 text, 5GB) which they would supply at €20 a month for the first x months, then €30 a month. I don't really use data on my phone that much, as I usually travel from WiFi location to WiFi location in a typical day and, as such, don't need an allocation of 5GB a month. In fact, when my 1+1 isn't deciding to download updates via Data when I'm connected to WiFi at the time, I typically don't exceed 500MB a month.

I've had a cursory look at some of the SIM only plans available (3, Meteor, O2, ID) but I'm becoming aware that there seem to be many more players in the market these days then I'm aware of. I wondered if anyone could point me at options I haven't considered yet? (for the record the ID 'build your own bundle' concept seems to, currently, be the front runner). My criteria are, mainly, 100 minutes, 100 texts, 500MB-1GB for the cheapest monthly cost possible. I already pay for a UPC land line which gives me a certain number of minutes international calls a month and use Skype quite frequently so that non-national calls aren't a consideration.