Hi Musroc
The answer to this one is by no means simple as you will need quite a few different cars to complete the game given that there are a number of series which require either a specific sub-set of models and/or a specific drive-train.
The cars you are looking at (e.g. the Esprit, the Zonda and the Vantage) are all cars which require a fair degree of skill to get the best out of (although they are amongst my personal favorites) so you might be better served, if you are just starting out, to go for something a bit easier to handle.
Run a few of the earlier and easier series and see what prize cars you turn up. Give them a bit of a trip round the circuit of your choice and get a feel for if you like them or not. If you win one of the lower end Race Bodied cars (such as the Camero Race Car or the Vertigo) then it would probably be best to stick with that for a while until you get a handle (no pun intended

) on tuning and driving.
If you are already some way into the game then you should be getting an idea about what you need or what suits you and any advice from an external source would be redundant.
As an aside to the technical intent of your question, you'll probably find that you get better {and kinder

} responses from the membership if you make an attempt at the use of proper grammar, spelling and punctuation when making posts (and I'm not poking fun or trying to insult you here, so please don't take offense).
'Text-ese' might be fine on your mobile but it doesn't go down well out here in web-land. I don't know how experienced you are in net-etiquette but being flamed is not a pleasant experience (and posts like the one above draw fire like nothing on earth

!) so be warned 👍.