Both ACE inhibitors and ARB's are good choices, IMO.
Both have their favourable effects on reducing BP. As well both share nephroprotective and vascular protective effects, there's some data that lisinopril may reduce or prevent glomerular damage. There's also some data that ACE inhibitors such as lisinopril may have suppressive effects on erythropoietin. This can be favourable to those with a chronically elevated RBC/hemoglobin/hematocrit in conjunction with hypertension. Ultimately, one should further evaluate the root cause of erythropoiesis adjacent to AAS. Such as undiagnosed sleep apnea.
An interesting thing about telmisartan outside of reducing blood pressure. It's acts as a full PPAR gamma agonist for insulin-sensitizing, and as a partial agonist/partial antagonist for pro-adipocytic activity, which may be beneficial for the prevention of body fat accumulation.
As aforementioned, both share some favourable effects, they both, as with all pharmaceutical drugs have side effects. Most are tolerable; at the same time, if any should arise, talk to your primary care provider to possibly switch it out to a different HTN drug.